NetBSD/sys/arch/pmax/dev/ims332.c

439 lines
11 KiB
C

/* $NetBSD: ims332.c,v 1.12 2000/01/10 03:24:32 simonb Exp $ */
/*-
* Copyright (c) 1992, 1993, 1995
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ims332.c 8.1 (Berkeley) 6/10/93
*/
/*
* Routines for the Inmos IMS-G332 Colour video controller
* Author: Alessandro Forin, Carnegie Mellon University
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: ims332.c,v 1.12 2000/01/10 03:24:32 simonb Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/fbio.h>
#include <machine/fbvar.h>
#include <pmax/dev/ims332.h>
#define assert_ims332_reset_bit(r) *r &= ~0x40
#define deassert_ims332_reset_bit(r) *r |= 0x40
/*
* local prototypes
*/
static u_int ims332_read_register (struct fbinfo *, int);
static void ims332_write_register (struct fbinfo *, int, unsigned int);
static __inline void ims332_cursor_off(struct fbinfo *fi);
static __inline void ims332_cursor_on(struct fbinfo *fi);
int
ims332init(fi)
struct fbinfo *fi;
{
int i;
/*
* Initialize the screen. (xcfb-specific)
*/
#ifdef notdef
u_int *reset = (u_int *)fi -> fi_base;
assert_ims332_reset_bit(reset);
DELAY(1); /* specs sez 50ns.. */
deassert_ims332_reset_bit(reset);
/* CLOCKIN appears to receive a 6.25 Mhz clock --> PLL 12 for
75Mhz monitor */
ims332_write_register (fi, IMS332_REG_BOOT,
12 | IMS332_BOOT_CLOCK_PLL);
/* initialize VTG */
ims332_write_register (fi, IMS332_REG_CSR_A,
IMS332_BPP_8 | IMS332_CSR_A_DISABLE_CURSOR);
DELAY(50); /* spec does not say */
/* datapath registers (values taken from prom's settings) */
ims332_write_register (fi, IMS332_REG_HALF_SYNCH, 0x10);
ims332_write_register (fi, IMS332_REG_BACK_PORCH, 0x21);
ims332_write_register (fi, IMS332_REG_DISPLAY, 0x100);
ims332_write_register (fi, IMS332_REG_SHORT_DIS, 0x5d);
ims332_write_register (fi, IMS332_REG_BROAD_PULSE, 0x9f);
ims332_write_register (fi, IMS332_REG_V_SYNC, 0xc);
ims332_write_register (fi, IMS332_REG_V_PRE_EQUALIZE, 2);
ims332_write_register (fi, IMS332_REG_V_POST_EQUALIZE, 2);
ims332_write_register (fi, IMS332_REG_V_BLANK, 0x2a);
ims332_write_register (fi, IMS332_REG_V_DISPLAY, 0x600);
ims332_write_register (fi, IMS332_REG_LINE_TIME, 0x146);
ims332_write_register (fi, IMS332_REG_LINE_START, 0x10);
ims332_write_register (fi, IMS332_REG_MEM_INIT, 0xa);
ims332_write_register (fi, IMS332_REG_XFER_DELAY, 0xa);
ims332_write_register (fi, IMS332_REG_COLOR_MASK, 0xffffff);
#endif /* notdef */
/* Zero out the cursor RAM... */
for (i = 0; i < 512; i++)
ims332_write_register (fi, IMS332_REG_CURSOR_RAM + i, 0);
/* Set up the color map... */
ims332InitColorMap (fi);
/* Enable display... */
ims332_write_register (fi, IMS332_REG_CSR_A,
IMS332_BPP_8
| IMS332_CSR_A_DMA_DISABLE
| IMS332_CSR_A_VTG_ENABLE);
ims332_cursor_off(fi);
return (1);
}
static u_char cursor_RGB[6]; /* cursor color 2 & 3 */
static u_int
ims332_read_register(fi, regno)
struct fbinfo *fi;
int regno;
{
u_char *regs = (u_char *)fi -> fi_vdac;
unsigned char *rptr;
u_int val, v1;
/* spec sez: */
rptr = regs + 0x80000 + (regno << 4);
val = *((volatile u_short *) rptr );
v1 = *((volatile u_short *) regs );
return (val & 0xffff) | ((v1 & 0xff00) << 8);
}
static void
ims332_write_register(fi, regno, val)
struct fbinfo *fi;
int regno;
unsigned int val;
{
u_char *regs = (u_char *)fi -> fi_vdac;
u_char *wptr;
/* spec sez: */
wptr = regs + 0xa0000 + (regno << 4);
*((volatile u_int *)(regs)) = (val >> 8) & 0xff00;
*((volatile u_short *)(wptr)) = val;
}
/*
* Turn off hardware cursor sprite.
*/
static __inline void
ims332_cursor_off(fi)
struct fbinfo *fi;
{
u_int csr;
csr = ims332_read_register (fi, IMS332_REG_CSR_A);
csr |= IMS332_CSR_A_DISABLE_CURSOR;
ims332_write_register (fi, IMS332_REG_CSR_A, csr);
}
/*
* Turn on hardware cursor.
*/
static __inline void
ims332_cursor_on(fi)
struct fbinfo *fi;
{
u_int csr;
csr = ims332_read_register (fi, IMS332_REG_CSR_A);
csr &= ~IMS332_CSR_A_DISABLE_CURSOR;
ims332_write_register (fi, IMS332_REG_CSR_A, csr);
}
/*
* Set screen colourmap to default state.
* For X11's benefit, the default sate entry is that
* zero is black and all other entries are full white.
* The hardwaer cursor is turned off.
*/
void
ims332InitColorMap(fi)
struct fbinfo *fi;
{
u_char *cmap;
int i;
cmap = (u_char *)(fi -> fi_cmap_bits);
ims332_write_register (fi, IMS332_REG_LUT_BASE, 0);
cmap [0] = cmap [1] = cmap [2] = 0;
for (i = 1; i < 256; i++) {
ims332_write_register (fi, IMS332_REG_LUT_BASE + i, 0xffffff);
cmap [i * 3] = cmap [i * 3 + 1] = cmap [i * 3 + 2] = 0xff;
}
for (i = 0; i < 3; i++) {
cursor_RGB[i] = 0x00;
cursor_RGB[i + 3] = 0xff;
}
ims332RestoreCursorColor (fi);
ims332_cursor_off(fi);
}
/* Load color map entry(s). */
int
ims332LoadColorMap(fi, bits, index, count)
struct fbinfo *fi;
const u_char *bits;
int index, count;
{
u_char *cmap_bits;
u_char *cmap;
int i;
if (index > 256 || index < 0 || index + count > 256)
return EINVAL;
cmap_bits = (u_char *)bits;
cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
for (i = 0; i < count; i++) {
ims332_write_register (fi,
IMS332_REG_LUT_BASE + i + index,
(cmap_bits [i * 3 + 2] << 16) |
(cmap_bits [i * 3 + 1] << 8) |
(cmap_bits [i * 3]));
cmap [i * 3] = cmap_bits [i * 3];
cmap [i * 3 + 1] = cmap_bits [i * 3 + 1];
cmap [i * 3 + 2] = cmap_bits [i * 3 + 2];
}
return 0;
}
/* Get color map entry(s). */
int
ims332GetColorMap(fi, bits, index, count)
struct fbinfo *fi;
u_char *bits;
int index, count;
{
u_char *cmap_bits;
u_char *cmap;
if (index > 256 || index < 0 || index + count > 256)
return EINVAL;
cmap_bits = (u_char *)bits;
cmap = (u_char *)(fi -> fi_cmap_bits) + index * 3;
bcopy (cmap, cmap_bits, count * 3);
return 0;
}
/*
* Video on/off
*
* It is unfortunate that X11 goes backward with white@0
* and black@1. So we must stash away the zero-th entry
* and fix it while screen is off.
*/
int
ims332_video_off(fi)
struct fbinfo *fi;
{
u_char *cmap_bits;
if (fi -> fi_blanked)
return 0;
cmap_bits = (u_char *)fi -> fi_cmap_bits;
ims332_write_register (fi, IMS332_REG_LUT_BASE, 0);
ims332_write_register (fi, IMS332_REG_COLOR_MASK, 0);
/* cursor now */
ims332_cursor_off(fi);
fi -> fi_blanked = 1;
return 0;
}
int
ims332_video_on (fi)
struct fbinfo *fi;
{
u_char *cmap;
if (!fi -> fi_blanked)
return 0;
cmap = (u_char *)(fi -> fi_cmap_bits);
ims332_write_register (fi, IMS332_REG_LUT_BASE,
((unsigned)cmap [0] |
((unsigned)cmap [1] << 8) |
((unsigned)cmap [2] << 16)));
ims332_write_register (fi, IMS332_REG_COLOR_MASK, 0xffffffff);
/* cursor now */
ims332_cursor_on(fi);
fi -> fi_blanked = 0;
return 0;
}
/*
* Cursor
*/
void
ims332PosCursor(fi, x, y)
struct fbinfo *fi;
int x, y;
{
if (y < 0)
y = 0;
else if (y > fi -> fi_type.fb_height - fi -> fi_cursor.height - 1)
y = fi -> fi_type.fb_height - fi -> fi_cursor.height - 1;
if (x < 0)
x = 0;
else if (x > fi -> fi_type.fb_width - fi -> fi_cursor.width - 1)
x = fi -> fi_type.fb_width - fi -> fi_cursor.width - 1;
fi -> fi_cursor.x = x;
fi -> fi_cursor.y = y;
ims332_write_register (fi, IMS332_REG_CURSOR_LOC,
((x & 0xfff) << 12) | (y & 0xfff));
}
void
ims332RestoreCursorColor (fi)
struct fbinfo *fi;
{
/* Bg is color[0], Fg is color[1] */
ims332_write_register (fi, IMS332_REG_CURSOR_LUT_0,
(cursor_RGB[2] << 16) |
(cursor_RGB[1] << 8) |
(cursor_RGB[0]));
ims332_write_register (fi, IMS332_REG_CURSOR_LUT_1, 0x7f0000);
ims332_write_register (fi, IMS332_REG_CURSOR_LUT_2,
(cursor_RGB[5] << 16) |
(cursor_RGB[4] << 8) |
(cursor_RGB[3]));
}
/* Set the color of the cursor. */
void
ims332CursorColor (fi, color)
struct fbinfo *fi;
unsigned int color[];
{
int i;
for (i = 0; i < 6; i++)
cursor_RGB[i] = (u_char)(color[i] >> 8);
ims332RestoreCursorColor(fi);
}
void
ims332LoadCursor(fi, cursor)
struct fbinfo *fi;
u_short *cursor;
{
int i, j, k, pos;
u_short ap, bp, out;
/*
* Fill in the cursor sprite using the A and B planes, as provided
* for the pmax.
* XXX This will have to change when the X server knows that this
* is not a pmax display.
*/
pos = 0;
for (k = 0; k < 16; k++) {
ap = *cursor;
bp = *(cursor + 16);
j = 0;
while (j < 2) {
out = 0;
for (i = 0; i < 8; i++) {
out = ((out >> 2) & 0x3fff) |
((ap & 0x1) << 15) |
((bp & 0x1) << 14);
ap >>= 1;
bp >>= 1;
}
ims332_write_register (fi, IMS332_REG_CURSOR_RAM + pos,
out);
pos++;
j++;
}
while (j < 8) {
ims332_write_register (fi, IMS332_REG_CURSOR_RAM + pos,
0);
pos++;
j++;
}
cursor++;
}
while (pos < 512) {
ims332_write_register (fi, IMS332_REG_CURSOR_RAM + pos, 0);
pos++;
}
/* The cursor pattern is loaded, so turn on the hardware sprite. */
ims332_cursor_on(fi);
}